Electrical annunciator



(No Model.) 2 Sheets-S1 1eet 1.

B. SMEAD. ELECTRICAL ANNUNGIATOR.

No. 402,626. Patented May 7, 1889 Wviiwwes, 17108 11??? N. PETERS. Fhololilhbxnphur. Wauhinglnlb Di C UNITED STATES.

PATENT OFFICE.

BENJAMIN SMEAD, OF CHICAGO, ILLINOIS.

ELECTRICAL AN NU NCIATO R.

SPECIFIQATION forming part of Letters Patent No. 402,626, dated May 7, 1889.

' Application filed February 12, 1889. Serial No. 299,634. (No model.)

To all whom it may concern.-

Be it known that I, BENJAMIN SMEAD, a citizen of the United States, residing in Chicago,

:county of Cook, and State of Illinois, have invented certain new and useful Improvements in Electrical Annunciators, ofwhich the fol-- a central office in which there is stationed an annunciator-case having numbers or names corresponding to the numbers or names of the various apartments, which, annunciatorcase has an index-finger in electrical connection with push-buttons in the various rooms, whereby when a button is pushed in any of the rooms the number or name of the room is indicated to the attendant in the central office. Such devices usually have in connection therewith a bell in the office, which is rung by the pushing of the button in any of the rooms. Heretofore it has been the practice to restore the index-finger to its normal position by mechanical means. I have provided, instead. of the usual appliances, a push-button in the office, so connected as to restore the finger to its normal position after the call has'been answered. I employ an annunciator-case having on its face or dial numbers or names corresponding to the numbers or names of the various rooms, a pair of magnets connected with the battery and with a push-button in each of the apartments, and whose armature is connected with and adapted by its movement to operate an index or mark ing finger, an office-bell electrically connected with the room, and a push-button for the office electrically connected with the annunciator-case.

In carrying out my invention I so construct the devices that a push on the room-button turns the marking-finger to indicate the number of the room and rings the bell a certain length of time to attract the attention of the attendant, and then, when said button is released, the bell is cut out of the circuit without disturbing the position of the index=finger, and a push on the office-button restores the marking-finger to its normal position.

In the drawings, Figure 1 shows a pair of coils, their armature, index-finger, and interposed mechanism in plan View, the finger being in its normal position. Fig. 2 is a similar View, the index-finger being in position to indicate a room-number. Fig: 3 is a side elevation of the device shown in Fig. 1. Figs. 4 and 5 are rear elevations of parts of the actuating mechanism interposed between the armature and the marking-finger, a stem or rod forming a part of said mechanism being shown in cross-section. Fig. 6 is a viewshowing the various parts connected, including the magnets, indicator-finger, and a fragmentary portion of the annunciator-case in perspective, the bell in elevation, the room-push in side elevation, partly in section, and the office-push in perspective, the desk or table upon which it is fixed being shown in section. In the drawings, A represents a suitable frame, in which are mounted magnets B B. O is the armature of these magnets, and to its pivot is secured one end of the stem 0, the other end of which projects forward and protrudes through a cam-groove, d, in a pivoted disk-segment, D. The pivot d of the segment D is projected through the wall of the annunciator front and supports on its outer end an index-finger, E. On the free corners of segment D are two projections, 01 which are adapted to engage when said segment is rocked the upper. end of a pivoted pin, F, workingbetween two fixed stops, f, secured to an insulating-plate, G, which in turn is secured on the inner face of the front of the frame A. Secured by suitable screws to the inner face of the insulatin g-plate G is a pair of spring-contacts, II, from which are led wires I Ithe former connected to one side of the battery, (indicated at J in Fig. 6,) and the other being connected with the coil of spool B.

Referring now to Fig. 6, which shows the connections complete, K represents a pushbutton supported by a spiral spring, is, surrounding a post, K, and adapted when depressed to impinge upon an angle or bend, Z, of a flat spring, L. From the base of said spring L a wire, M, is led through spool B and splices onto wire I. The stem K is connected by a wire, N, to the opposite side of the battery, and thereby, when the button K is depressed until it impinges upon the shoulderl of the spring L, a circuit is completed from the button through spool 13, and thereby the armature C is attracted to said spool, and through the medium of the stem 0 the segment D is rocked, thus turning the finger E to indicate a number on the annunciatorcase corresponding to the number of the room wherein the push-button is located. The swinging of the segment D will operate through the intervention of the pivoted pin F to'bring the springs ll into contact, thus closing one of the breaks in the wire from the ofiice. Button K, being further depressed, will pass the bend Zof spring L and come into contact with a bend in the upper end of a spring, 0, whose base is connected by a wire, P, through bell Q in the oflice, to the opposite side of the battery, whereby the ringing of the bell is effected. \Vhen the pressure is released on the button K, the spring will first force it out of contact with 0, thereby breaking the circuit of the bell and passing upward. The button will again engage the bend Z, forming again a circuit through spool 13, leaving the index-finger indicating the number of the room.

R indicates an oflice push-button, which is mounted upon a fiat spring, R, whose base is connected by a wire, S, with one side of battery J '1 represents a contact below push-button R, which is connected by a wire, U, with spool B.

Button B, being depressed, will form a circuit through wire U and spool B, thus attracting the armature to said spool and operating stem 0' to rock segment D back to its first position, opening contacts H, and turning indexfinger E back to its normal position.

I claim- 1. In an annunciator, the combination, with magnets electrically connected to a battery and to apush located at a distance, of a stem connected to the pivot of the armature of the m agnet-s and having its free end movably connected with a pivoted segment, a markingfin ger secured to turn with the pivot of the segment, a pivoted pin adapted to be rocked on its pivot by the movement of the segment, insulated spring-contact points adapted to be closed by the movement of the pin in one direction, and a push joined in circuit with the spring contacts and one of the magnets, whereby when the push is operated the finger is returned to its normal position and the circuit through the spring-contacts opened, substantially as described.

2. A movable contact device forming one terminal of a circuit including the armaturemagnet, and engaging first the other terminal of the circuit, and on its further movement breaking said circuit and engaging the other terminal of a circuit including a bell-magnet, substantially as described.

3. In combination, a spring-seated contact device forming one terminal of a circuit includin g the armature-magnet, and adapted by its initial movement to engage the other terminal of said circuit, and by its further movement to engage the terminal of a second circuit includinga bell, and by its return movement under the influence of the spring to break said circuits in reverse order, substantially as described.

BENJAMIN SMEAD.

lVitnesses:

C. G. LINTHICUM, T. D. BUTLER. 

